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Laboratory 20. Heart
Step 10. The Right Coronary Artery and its Branches

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Identify the right coronary artery [probe] [cross-section] as it arises from the ascending aorta. This vessel passes in the coronary sulcus between the right atrium and right ventricle. It gives off a branch, the right marginal artery that passes along the sternocostal margin of the heart.

On the posterior surface of the heart the right coronary artery usually gives a branch, the posterior interventricular artery, that descends in the posterior interventricular groove toward the apex of the heart. In some individuals, the posterior interventricular artery is a branch of the
circumflex artery.

Links and References:
Grant's: 1.50, 1.51, 1.53
Netter: 204, 205, 206, 207
Rohen/Yokochi: 237, 239, 244